Dvd disc will not eject even on start up

Hi There,
Try holding down the 'mouse' bar (i.e., The clicker below the track pad, or the track-pad itself if you don't have the 'bar') when you are starting up the laptop. This will usually eject disks in the optical drive.
If that doesn't work, and dragging the disk icon to the trash doesn't eject the disk, then you probably have an issue with the drive itself.
Take a look at ifixit.com for guides on removing the optical drive and opening the drive to get the disk out.
Hope this helps & good luck!